Question

which graph correctly depicts the relationship between pressure and temperature when volume and amount of gas are constant?

Explanation:

When volume and amount of gas are constant, the relationship between pressure (P) and temperature (T) follows Gay-Lussac's Law, which states \( P \propto T \) (pressure is directly proportional to absolute temperature in Kelvin). A direct proportionality is represented by a straight line passing through the origin on a P-T graph.

Answer:

The third graph (a straight line with positive slope starting from the origin, plotting Pressure (atm) vs. Temperature (K))